Low-frequency band gaps within a local resonance structures
2020; World Scientific; Volume: 34; Issue: Supp01 Linguagem: Inglês
10.1142/s0217984921500147
ISSN1793-6640
AutoresYong Yan Zhang, Nan Gao, Guang Shen Xu, Jiu Hui Wu, Min Cao, Zong Tuan Zhou,
Tópico(s)Metamaterials and Metasurfaces Applications
ResumoLocal resonance structure (LRS) can effectively suppress wave transmission, but the design of LRS with tunable band gaps is still a challenge. This work proposes an LRS with two tunable band gaps, where the first bandwidth is successfully enlarged almost five times, and finally a low-frequency broadband with 60–420 Hz is obtained with the second disappearing because of the remarkable modification of band gaps obtained only by adjusting the stiffness rather than by large deformation or changing geometric configuration in traditional methods. The mechanism of tunable band gaps would have important implications for designing metamaterials with broadband, and potential applications for vibration and noise attenuation.
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